Question

2.4×6.9+3.3.1×0.4的简便运算？

Answer 1

2.4×6.9+3.1×0.4
=2.x6.9+0.4x6.9+0.4x3.1
=13.8+0.4x(6.9+3.1)
=13.8+0.4x10
=13.8+4
=17.8

Answer 2

回答如下 ：
2.4 × 6.9 + 3.1 × 0.4 的数学题目
的竖式简便运算步骤如下 ：
（ 1 ） = 16.56 + 1.24
（ 2 ） = 17.8

Answer 3

2.4x6.9+3.31x0.4
=（2+0.4）x6.9+3.31x0.4
=2x6.9+0.4x6.9+3.31x0.4
=2x6.9+0.4x（6.9+3.31）
=2x6.9+0.4x10.21
=13.8+4.084
=17.884

Answer 4

2.4x6.9+3.1x0.4
=0.4x6x6.9+3.1x0.4
=0.4（41.4+3.1）
=0.4x44.5
=17.8

Answer 5

2.4×6.9+3.3.1×0.4的简便运算？
算式不成立，无解